About ScreenCheckup

ScreenCheckup is a free browser tool for visually checking a monitor, laptop, phone, or TV screen. It puts solid colors and gray patterns in front of you, so you can take a closer look at a suspicious point, lingering image, or uneven area.

Built around a simple inspection

Start with the all-around screen test, or choose checks for fixed pixels, OLED image retention, or LCD edge light. You can save or copy your own notes without an account. Records remain in your browser.

Useful patterns, honest limits

Your eyes inspect the physical display. The tool cannot scan it, measure color accuracy, repair pixels or burn-in, or decide warranty coverage. Our methodology lists the exact patterns and the software checks we performed, including what remains untested.

Who publishes the explanations?

Guides are published under the ScreenCheckup name. We use AI to help with research and drafts, then link to manufacturer sources. No certified engineer or testing lab has reviewed this site. Our editorial policy explains the process.

Have feedback or a correction? Contact ScreenCheckup. For questions about your display’s repair or warranty, contact its manufacturer.